140CPU67861C

Modicon Quantum Unity Hot Standby Processor

266 MHz, 11 MB RAM, Single‑Mode Fiber Ethernet, Conformal Coated, 2‑Slot

General Information

• Part Number: 140CPU67861C

• Manufacturer: Schneider Electric

• Series: Modicon Quantum (Unity Pro XL)

• CPU Core: 32‑bit PowerPC RISC, 266 MHz, with FPU

• On‑board RAM: 11264 kB (11 MB) (1536 kB dedicated data area)

• Flash Memory: 4 MB (firmware/backup)

• Coating: Conformal Coated (Humiseal 1A33) – harsh/corrosive environments

• Slot Occupancy: 2 slots (double width)

• Software: Unity Pro XL (redundancy enabled)

• Status: Discontinued (EOL)

• Hot‑Swappable: Yes

• Key Difference from 140CPU67861: Conformal coated (vs standard coating)

• Primary Use: Large programs, high‑end Hot Standby, long‑distance fiber, harsh sites

Performance

• Boolean Logic: ~10.28 K instructions/ms

• Mixed Logic: ~10.07 K instructions/ms

• Floating‑point: Supported (on‑board FPU)

• System Overhead: 1 ms (master task), 0.2 ms (fast task)

Memory & Expansion

• Internal RAM: 11264 kB (11 MB)

• PCMCIA (2 slots):

  • Program memory: up to 7 MB

  • File storage: up to 8 MB

• Backup: 3 V lithium battery (≈10 years)

• RTC: Integrated, battery‑backed

I/O Capacity

• Distributed Digital I/O: 8,000 In / 8,000 Out (MB+)

• Remote I/O (max): 31,744 points (In/Out)

• Distributed Stations: 63 (Modbus Plus)

• Remote Stations: 31 (per RIO/Ethernet bus)

• Local Expansion Racks: up to 2

Integrated Communications

• 1 × Modbus Plus (MB+): D‑Sub 9, 1 Mbps

• 1 × Single‑Mode Fiber Ethernet: 100 Mbps, max 20 km

• 1 × Modbus RTU RS232/485: Serial port

• 1 × USB: Programming interface

Electrical

• Backplane Current: 2.8 A @ 5.1 VDC

• Power Consumption: 14.3 W

Environmental

• Operating Temp: 0 °C ~ +60 °C

• Storage Temp: −40 °C ~ +85 °C

• Humidity: 5%–95% non‑condensing

• Altitude: up to 5,000 m

Certifications

Model Comparison

• 140CPU67861: 11 MB RAM, single‑mode fiber, standard coating

• 140CPU67861C: 11 MB RAM, single‑mode fiber, conformal coated

• 140CPU67261: 3 MB RAM, single‑mode fiber, standard coating